html{
    height: 2000px;
}
body {
    width: 100vw;
    
}

hr{
    width: 85%;
    background-color: darkgray;
    height: 1px;
    margin-top: 50px;
    border: none;
    margin-left: 0px;
    /* margin: auto; */
}
.box{
    width: 100%;
    /* background-color: aquamarine; */
    /* margin-top: 150px; */
    /* margin-left: 200px; */
   /* margin: 0 auto; */
}
.content{
    opacity: 0.7;
    /* margin: auto; */
    margin-left: 120px;
    /* position: absolute; */
}
#tu1{
    width: 90%;
    height: 170px;
    opacity: 0.7;
    /* margin: 0 auto; */
    /* text-align: center; */
}
#btn1{
    width: 150px;
    height: 50px;
    background-color: cornflowerblue;
    border: 0px;
    color: white;
    font:  600 20px/200% "";
    border-radius: 5px;
    margin-top: 25px;
    margin-left: 30px;
    
}

.b{
    /* width: 80%; */
    /* height: 100px; */
    
    margin-top: 40px;
    position: relative;
    margin-left: 150px;
}

.b1{
    margin-top: 35px;
}
.qu1{
    
    position: relative;
}

.hang1{
    margin-top: -50px;
    width: 67%;
    height: 40px;
    background-color: #b3dbff;
    margin-left: 75px;
    font:  600 16px/250% "";
    text-indent: 1em;
    padding: 3px;
}

.hang2{
    margin-top: -50px;
    width: 65%;
    height: 150px;
    background-color: #f4f4f4;
    margin-left: 75px;
    font:  600 16px/250% "";
    text-indent: 1em;
    padding: 10px;
}


